William Roberts (1895-1980) was a British artist whose works were displayed in the Blast as pieces of Vorticism, even though Roberts preferred his works to be called cubanist. Roberts's works is classified as part of the modernist art movement, an example provided with “The Toe Dancer.” Similar to the modernist movement in literature, art too began to move away from traditional forms and depictions and shifted focus in imagery to that which was believed to best exemplify modern life. 

Sources:

Roberts, William. “The Toe Dancer.” English Cubist, http://www.englishcubist.co.uk/toedancer.html.

“Vorticism.” Tate Gallery, https://www.tate.org.uk/art/art-terms/v/vorticism.